maximal oxygen consumption Dotaz Zobrazit nápovědu
- MeSH
- lidé MeSH
- sporty MeSH
- spotřeba kyslíku MeSH
- tělesná námaha MeSH
- zátěžový test metody MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- MeSH
- dítě MeSH
- ergometrie MeSH
- spotřeba kyslíku MeSH
- tělesná námaha MeSH
- Check Tag
- dítě MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
Cílem naší studie bylo navrhnout a ověřit test se stupňovanou rychlostí k determinaci maximální specifické spotřeby kyslíku (VO2 max) při lezení převislé stěny. Testování se zúčastnilo 14 lezkyň s lezeckou výkonností 3-10 UIAA stupnice (Union Internationale des Associations d'Apinisme). Vlastní stupňovaný test začal ve sklonu 105˚ a při rychlosti 20 (případně 25 nebo 30 u pokročilejších lezkyň) kroků·min-1. Každé tři minuty došlo ke zvýšení rychlosti lezení o 5 kroků·min-1. Test končil pádem spojeným s vyčerpáním a neschopností udržet požadované tempo. Dosažená rychlost lezení v testu byla ve významném vztahu s lezeckou výkonností (r = 0,90) a maximální specifickou spotřebou kyslíku (r = 0,72). Test se zvyšující se rychlostí v převislé stěně se ukázal jako vhodný k posouzení lezecké výkonnosti a k určení specifické VO2 max u populace sportovních lezkyň. Výsledky naznačují, že minimální úroveň specifické VO2 max 45 – 50 ml·kg-1·min-1 pro ženy je nezbytná k lezení obtížných cest.
The aim of the study was to propose and verify the climbing test with increasing speed on the overhanging wall to determine the maximal specific oxygen uptake (VO2 max). Fourteen female climbers with a climbing ability ranging from 3 to 10 UIAA scale (Union Internationale des Associations d'Alpinisme) took part in the study. The test started at an inclination of 105˚ and at the climbing speed of 20 (25 or 30 in more advanced climbers) movements·min-1. The speed of climbing was increased by 5 movements·min-1 every three minutes. The test ended with the fall of the climber associated with individual exhaustion. Climbing ability was closely related to attained climbing speed (r = 0.90) and maximal specific oxygen uptake (r = 0.72). Results showed that the test with the increasing speed on overhanging wall is suitable to determine the specific VO2 max in female sport climbers. The results suggest that a minimal VO2 max 45 – 50 ml·kg-1·min-1for female climbers is indispensable to climb hard routes.
- Klíčová slova
- lezení, aerobní výkon, rychlost,
- MeSH
- experimenty na lidech MeSH
- financování organizované MeSH
- horolezectví * fyziologie klasifikace MeSH
- kardiovaskulární systém MeSH
- lidé MeSH
- pilotní projekty MeSH
- sporty fyziologie klasifikace MeSH
- spotřeba kyslíku * MeSH
- vitální kapacita MeSH
- Check Tag
- lidé MeSH
- ženské pohlaví * MeSH
The purpose of the present study was to examine the effects of long term (prolonged) football training on maximal oxygen uptake (V̇O2) and isokinetic muscle strength in young football players and untrained boys of the same biological age. Twenty football competitive boys (mean age 14 ± 0 yrs; height 165.5 ± 8.5 cm; weight 59.9 ± 9.5 kg; years of training 7 ± 3) and eighteen untrained school boys (mean age 14 ± 0; height 168.22 ± 10.46 cm; weight 59.3 ± 9.9 kg) of the same biological age volunteered to participate in the study. Sexual maturation classified according to Tanner’s stage 3. The football players participated both in their school’s physical education program and in their football team training program while the untrained group participated only in their school’s physical education program (2–3 times per week for 40 min). All subjects were tested for maximal oxygen uptake (V̇O2) and respiratory exchange ratio (RER) on the treadmill using an open circuit spirometry. The isokinetic peak torque values of quadriceps (Q) and hamstrings (H) as well as the H : Q strength ratios were recorded. Hcon : Qcon was calculated as the ratio of the peak concentric torque of H to the peak concentric torque of the Q. Results showed that the trained group had significantly lower heart rate in rest (p < 0.001), higher RER (p < 0.001), maximal blood lactate (BLmax) (p < 0.001) and higher V̇O2 max in both relative and absolute values (p < 0.001) compared to the untrained group. At angular velocities of 60 ° s−1 and 180 ° s−1 the relative peak torque of Q and H were significantly higher (Q = p < 0.01; H = p < 0.01). However, the absolute values of Q and H as well as the H : Q ratios at all angular velocities did not differ significantly between the two groups. The results suggest that systematic football training (intensity and duration) has a positive effect in metabolic capacity, cardiorespiratory system and neuromuscular function.
The purpose of this study was to compare markers of glycolytic metabolism in response to the Wingate test and the incremental test in road and mountain bike cyclists, who not different performance level and aerobic capacity. All cyclists executed the Wingate test and incremental test on a cycle ergometer. Maximal power and average power were determined during the Wingate test. During the incremental test the load was increased by 50 W every 3 min, until volitional exhaustion and maximal aerobic power (APmax), maximal oxygen uptake (VO2max), and time of VO(2)max plateau (Tplateau) were determined. Post-exercise measures of oxygen uptake (VO(2)post), carbon dioxide excretion, (VCO(2)post), and the ratio between VCO(2)/VO(2) (RERpost) were collected for 3 min immediately after incremental test completion. Arterialized capillary blood was drawn to measure lactate (La-) and hydrogen (H+) ion concentrations in 3 min after each test. The data demonstrated significant differences between mountain bike and road cyclists for Tplateau, VO(2)post, VCO(2)post, La- which was higher-, and RERpost which was lower-, in mountain bike cyclists compare with road cyclists. No differences were observed between mountain bike and road cyclists for APmax, VO(2)max, H(+) and parameters measured in the Wingate test. Increased time of VO2max plateau concomitant to larger post-exercise La- and VO(2) values suggests greater anaerobic contribution during incremental testing efforts by mountain bike cyclists compared with road cyclists.
- MeSH
- antropometrie MeSH
- biologické markery krev MeSH
- časové faktory MeSH
- cyklistika fyziologie MeSH
- fyzická vytrvalost fyziologie MeSH
- kyselina mléčná krev MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- spotřeba kyslíku fyziologie MeSH
- zátěžový test metody MeSH
- Check Tag
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
